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Finding the Fourth Proportional to 1,560.91, 2,153.97 and 971.44

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Solution

The fourth proportional to 1,560.91, 2,153.97 and 971.44 is: 1,340.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,560.91 : 2,153.97 = 971.44 : x
  2. Step 2: Convert to fraction form
    1,560.91/2,153.97 = 971.44/x
  3. Step 3: Cross multiply
    1,560.91x = 2,153.97 × 971.44
  4. Step 4: Simplify right side
    1,560.91x = 2,092,452.62
  5. Step 5: Solve for x
    x = 2,092,452.62/1,560.91
  6. Step 6: Final answer
    x = 1,340.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.